$OpenBSD: patch-chrome_browser_ui_views_tabs_tab_strip_cc,v 1.11 2017/04/19 05:16:47 robert Exp $
--- chrome/browser/ui/views/tabs/tab_strip.cc.orig.port	Tue Jan  3 20:37:12 2017
+++ chrome/browser/ui/views/tabs/tab_strip.cc	Tue Jan  3 20:37:22 2017
@@ -323,7 +323,7 @@ NewTabButton::NewTabButton(TabStrip* tab_strip, views:
       tab_strip_(tab_strip),
       destroyed_(NULL) {
   set_animate_on_state_change(true);
-#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+#if (defined(OS_LINUX) || defined(OS_BSD)) && !defined(OS_CHROMEOS)
   set_triggerable_event_flags(triggerable_event_flags() |
                               ui::EF_MIDDLE_MOUSE_BUTTON);
 #endif
